21000132231101 has 4 divisors (see below), whose sum is σ = 21041881997472. Its totient is φ = 20958382464732.

The previous prime is 21000132231077. The next prime is 21000132231103. The reversal of 21000132231101 is 10113223100012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21000132231101 - 2¹⁴ = 21000132214717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21000132231101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000132231103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20874882431 + ... + 20874883436.

It is an arithmetic number, because the mean of its divisors is an integer number (5260470499368).

Almost surely, 2^{21000132231101} is an apocalyptic number.

It is an amenable number.

21000132231101 is a deficient number, since it is larger than the sum of its proper divisors (41749766371).

21000132231101 is an equidigital number, since it uses as much as digits as its factorization.

21000132231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41749766370.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21000132231101 its reverse (10113223100012), we get a palindrome (31113355331113).

The spelling of 21000132231101 in words is "twenty-one trillion, one hundred thirty-two million, two hundred thirty-one thousand, one hundred one".